Sounds like the effect of feeding seagulls (or pigeons) with bread treated with bi-carbonate of soda. Their bodies are not designed to expel the gas built up, and they end their days by exploding.


Or so I've been told!

Nigel


All the world seems in tune on a spring afternoon,
When we're poisoning pigeons in the park.
Every Sunday you'll see my sweetheart and me,
As we poison the pigeons in the park.


Lehrer